Frequency dependence of initial magnetic permeability for HgCr2Se4 near the curie temperature

1977 ◽  
Vol 43 (2) ◽  
pp. K199-K200 ◽  
Author(s):  
J. Jelonek ◽  
M. Szczygielski
Keyword(s):  
Curie Temperature ◽  
Frequency Dependence ◽  
Magnetic Permeability ◽  
Initial Magnetic Permeability

Frequency dependence of magnetic permeability of hollow cylindrical ferromagnetic pieces

2000 ◽  
Vol 36 (3) ◽  
pp. 210-217 ◽  
Author(s):  
V. A. Sandovskii ◽  
V. V. Dyakin ◽  
M. S. Dudarev
Keyword(s):  
Frequency Dependence ◽  
Magnetic Permeability

Determination of Initial Magnetic Permeability of YIG Thin Films Using the Current Sheet Method

2011 ◽  
Vol 324 ◽  
pp. 290-293 ◽  
Author(s):  
Ali Siblini ◽  
Ismaïl Khalil ◽  
Jean Pierre Chatelon ◽  
Jean Jacques Rousseau
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Current Sheet ◽  
Magnetic Permeability ◽  
Thin Layers ◽  
Original Design ◽  
Radio Frequency Sputtering ◽  
Initial Magnetic Permeability ◽  
Lcr Meter ◽  
Iron Garnet

Abstract. A new technique of inductive measure to determine the initial magnetic permeability (r) of Yttrium Iron Garnet (YIG) thin films has been conceived and developed in our laboratory. The magnetic material is deposited by radio-frequency sputtering between two copper thin layers on alumina substrate. Because the as-deposited films are amorphous and non magnetic, thermal annealing is necessary to make the films crystallize and to obtain satisfactory magnetic properties. After different tests considering the geometrical, morphological and magnetic properties, we have established a protocol permitting to manufacture a prototype in an original design. The performance of the fabricated micro-inductor has been checked using a physical-chemistry characterization. To obtain accurate measurements, we have used a four-point probe test bench and a precision LCR meter. The current sheet method has been validated with thick layers of commercial YIG. The results obtained for thick and thin films of YIG have been compared to the simulation and theoretical ones. Several tests, made for different thickness and different number of loops, have permitted us to evaluate the magnetic permeability of YIG thin films to 32 ± 4.

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